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path: root/macros/luatex/generic/lutabulartools/lutabulartools.lua
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--% Kale Ewasiuk (kalekje@gmail.com)
--% 2021-11-07
--% Copyright (C) 2021 Kale Ewasiuk
--%
--% Permission is hereby granted, free of charge, to any person obtaining a copy
--% of this software and associated documentation files (the "Software"), to deal
--% in the Software without restriction, including without limitation the rights
--% to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
--% copies of the Software, and to permit persons to whom the Software is
--% furnished to do so, subject to the following conditions:
--%
--% The above copyright notice and this permission notice shall be included in
--% all copies or substantial portions of the Software.
--%
--% THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF
--% ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
--% TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
--% PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT
--% SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
--% ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
--% ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
--% OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE
--% OR OTHER DEALINGS IN THE SOFTWARE.

local ltt = {}

--todo clean up the code, make some stuff local
--todo maybe add the penlight lua table to latex tabular?

--integrate current cell
--todo check if S[] column cells work!!!
--todo might be smarter to just append this to tabular commands and read argument

-- Initialize counter variable
ltt.NumTabCols = 0
ltt.NumTabColsAbv = 0 -- num of tab columns  if above 1
ltt.TabColSpec = ''
ltt.TabColSpecAbv = '' -- tab column spec if above 1
ltt.CurTabColAbv = '' -- current tab column spec if above 1
ltt.TabColNum = 0
ltt.NumBkts = 0
ltt.NumTabColsMX = 0


--todo re=enable
local glue_t, unset_t, tabskip_st = node.id'glue', node.id'unset'
local tabskip_st = table.swapped(node.subtypes'glue').tabskip
assert(tabskip_st)


function ltt.get_TabColNum()
    local nest
    for i = tex.nest.ptr, 1, -1 do
      local tail = tex.nest[i].tail
      if tail.id == glue_t and tail.subtype == tabskip_st then
        nest = tex.nest[i]
        break
      end
    end
    if nest then
      local col = 1
      for _, sub in node.traverse_id(unset_t, nest.head) do
        col = col + sub + 1
      end
      ltt.TabColNum = col
    else
      ltt.TabColNum = 1
    end
    ltt.CurTabColAbv = ltt.TabColSpecAbv:sub(ltt.TabColNum,ltt.TabColNum)
    ltt.NumTabColsMX = math.max(ltt.NumTabColsMX, ltt.TabColNum) -- a different way to calculate total cols
    return ltt.TabColNum
end


function ltt.get_TabRowNum()
    return tex.count['c@RowNumCnt'] -- access latex counter
end

-- The next function computes the number of columns from
-- contents of string 'zz'
function ltt.calc_NumTabCols( zz )
    --help_wrt(zz, 'col spec OG')
    -- -- NOT NEEDED: zz = zz:gsub ( "^.-(%b{}).-$", "%1" )  -- retain the first "{....}" substring
    zz = zz:gsub ( "%*%s-{(%d-)}%s-(%b{})" ,     -- expand expressions such as "*{5}{l}" to "lllll"
            function(y, z ) z = z:sub (2 , -2)  return string.rep (z, y) end ) --
    zz = zz:gsub ( "%b{}" , "" ) -- omit all stuff in curly braces and square
    zz = zz:gsub ( "%b[]" , "" )
    zz = zz:gsub ( "[@!|><%s%*\']" , "" )  -- some more characters to ignore
    -- todo: any columns defined that break into more than one column should be expanded here
    --help_wrt(zz, 'col spec CLEAN')
    ltt.TabColSpec = zz -- stripped column spec with no {} or <
    ltt.NumTabCols = string.len(ltt.TabColSpec)
    if ltt.NumTabCols > 1 then
        ltt.TabColSpecAbv = ltt.TabColSpec
        ltt.NumTabColsAbv = ltt.NumTabCols
    end
end

--todo fix square brackets after letters, expand multiple
--calc_NumTabCols('ss')
--calc_NumTabCols('*{6}{s}')
--calc_NumTabCols('l*{6}{l}')
--calc_NumTabCols('lll')
--calc_NumTabCols('ll[]')
--calc_NumTabCols('ll[]*{6}{l}')
--calc_NumTabCols('*{6}{l}')
--calc_NumTabCols('y*{6}{sq}x')
--print(_TabColSpec.. '<---Column spec')

--http://ctan.mirror.rafal.ca/macros/latex/contrib/multirow/multirow.pdf
--http://ctan.mirror.colo-serv.net/macros/latex/contrib/makecell/makecell.pdf
-- todo CONSIDER THIS
-- https://tex.stackexchange.com/questions/331716/newline-in-multirow-environment



--todo
-- if p{} column, and multirow is 1, use {=} instead of {*}
-- but note, makecell will not work. So you may want to skip it.multicolumn
-- this case should be considered in this code.
-- for example: \multirow{2}{=}

function ltt.MagicCell(s0,spec,mcspec,pre,content)
    --
    local STR = ''
    reset_bkt_cnt()

    local v, h, r, c, mrowsym, skipmakecell = ltt.parse_MagicCell_spec(spec) -- get v/h align, number rows/columns

    local mcspec = mcspec or ''

    h, mcspec, c = ltt.get_HColSpec(h, mcspec, c)  -- infer horizontal alignment, num columns

    --help_wrt(_CurTabColAbv,'current column')
    if s0 == _xTrue or (pl.List({'S', 'Q', 'L', 'R'}):contains(ltt.CurTabColAbv) -- special columns for SI
            and c == '') then -- multicolumn cannot have {} around it todo test with siunitx, num rows, num columns
        STR = STR .. '{'                                       -- multirow and makcell must have {} around it S column is used
        add_bkt_cnt()
    end

    if c ~= '' then
        STR = STR .. "\\multicolumn{"..c.."}{"..mcspec.."}{"
        add_bkt_cnt()
    end

    if r ~= '' then
        STR = STR .."\\multirow["..v.."]{"..r.."}{"..mrowsym.."}{" -- optional arg here
        add_bkt_cnt()
    end

    if not skipmakecell then
        if pre ~= '' then
            STR = STR.."\\renewcommand{\\cellset}{"..pre.."}"
        end

        STR = STR.."\\makecell[{"..v.."}{"..h.."}]{"
        add_bkt_cnt()
    else
        content = content:gsub('\\\\', '\\newline')
    end

    STR = STR..content..close_bkt_cnt()
    --Troubleshooting
    --help_wrt(STR..' <<< magic cell string')
    tex.sprint(STR)--tex print the STR
end


function ltt.parse_MagicCell_spec(spec)
    local mrowsym = '*'
    local skipmakecell = false
    if string.find(spec, '=')  then
        spec = spec:gsub('=', '')
        mrowsym = '='
        skipmakecell = true
    end

    spec = spec:lower():gsub('%s','')  -- take lower case and remove
    local vh, rc = spec:gextract('%a')  -- extract characters
    local v = vh:gfirst({'t', 'm', 'b'}) or 't'
    local h = vh:gfirst({'l', 'c', 'r'}) or ''
    v = v:gsub('m', 'c')

    local rc_ = (rc):split(',')
    local c = rc_[1] or ''  --num columns, width
    local r = rc_[2] or '' --num rows, height
    if c == '0' or c == '1' then c = '' end
    if r == '0' or r == '1' then r = '' end

    return v, h, r, c, mrowsym, skipmakecell
end


ltt.TabColMapping = { -- horizontal cell alignment that multicolumn should use if () or [hori] not passed to func
    l = 'l',
    c = 'c',
    r = 'r',
    p = 'p',
    P = 'c',
    X = 'l',
    Y = 'c',
    Z = 'l',
    N = 'c',
    L = 'l',
    R = 'r',
    C = 'c',
}

function ltt.get_HColSpec(h, mcspec, c) -- take horizontal alignment
    -- c is num columns, h is horizontal alginment,
    --Assumes _TabColNum was calculated previosly
    ltt.get_TabColNum()
     if c == '+' then  -- fill row to end
        c =  tostring(ltt.NumTabColsAbv -  ltt.TabColNum + 1)
    end
    if h == '' then -- if horizontal not provided, use declared column
        h = ltt.TabColMapping[ltt.CurTabColAbv] or 'l'
    end
    if c ~= '' then -- only make new mcspec if column nums > 0
        if mcspec == '' then -- and if no mcspec was passed
            mcspec = h
            if ltt.TabColNum == 1 then -- if first column, auto detect padding
                mcspec = '@{}'..mcspec
            end
            if (ltt.TabColNum + tonumber(c) - 1) == ltt.NumTabColsAbv then  -- if end on last column
                mcspec = mcspec..'@{}'
            end
        else -- if mcspec if given, extract the alignment
            ltt.calc_NumTabCols(mcspec)
            h = ltt.TabColSpec -- get 1 character column spec from mcspec and override h
        end
    end
    return h, mcspec, c
end


-- midrule stuff

function ltt.get_midrule_col(s)
    if string.find(s, '+')  then
        s = s:gsub('+', '')
        if (s == '') or (s == '0') then
            s = 1
        end
        s = tostring(ltt.NumTabColsAbv - tonumber(s) + 1) -- use number of tabular columns above 0,
    end
    return s
end

--todo if comma present, create multiple according to spec. Also allow LR in []

--- midrule stuff ---

function ltt.make1cmidrule(s, r, c, cmd) -- s=square r=round c=curly
    cmd = '\\'..cmd
    if s ~= '' then
        cmd = cmd..'['..s..']'
    end
    if r ~= '' then
        cmd = cmd..'('..r..')'
    end
    t = string.split(c, '-')
    if t[2] == '' then
        t[2] = '+'
    end
    if t[2] == nil then
        t[2] = t[1]
    end
    c = ltt.get_midrule_col(t[1])..'-'..ltt.get_midrule_col(t[2])
    cmd = cmd..'{'..c..'}'
    --help_wrt(cmd)
    tex.print(cmd)
end

function ltt.makecmidrules(s, r, c, cmd)
    for k, c1 in pairs(string.split(c, ',')) do
        r1, c2 = c1:gextract('%a')
        if r1 == '' then -- if nothing passed in with the column
            r1 = r -- set to the global value passed in round brackets
        end
        ltt.make1cmidrule(s, r1:strip(), c2:strip(), cmd)
    end
end


return ltt -- lutabulartools